MAINTENANCE/SERVICE
Gasoline Engine (continued)
IGNmON
TIMING ADJUSTMENT - GAS ENGINE
A
WARNING
:
To
avoid personal injury,
disengage
all drives and engage
park
brake.
It
is
necessary
to
have
the
engine
running
for this
procedure.
Be
sure
everyone
in
the
area
is
aware
that the
machine
is
being
serviced.
Use extreme care
when
working
around
moving
parts.
Never
wear
loose
fitting
or
dangling
clothing.
Keep
hands, feet,
clothing
and
hair
away
from
moving
parts.
For
maximum
engine performance, position
distributor (A) correctly
to
give
proper
ignition
timing
.
To
adjust:
1.
Connect
secondary lead
of
timing light
to
No
.
1
spark
plug
(8).
2.
Connect
red primary lead
to
positive battery
terminal
and
black
primary
lead
to
negative
battery terminal.
3.
If
unit is
not
equipped wi
th
optional
tachometer
,
connect
tachometer
to
engine.
4. Loosen
bolt
at
distributor
mount
enough
to
allow
rotation
of
distributor
by
hand.
5. Start engine
and
run
to
normal operating
temperature.
6. Disconnect throttle rod
at
bellcrank
(C)
and
move
rod
to
achieve
tach
reading
of
500 RPM.
7.
Aim
timing
light
at
indicator scale
at
fan
end
of
engine and rotate distributor (A)
to
align timing
mark
(D)
on
crank
pulley
with
the
5·
BTC
mark
.
NOTE
:
DO
NOT
use distributor vacuum advance
chamber
(E)
as
a
turn
handle.
8. When
marks
align,
stop
engine
and
tighten
bolt
at
distributor mount.
9. Start engine, set
at
500 RPM
and
recheck
timing
with
timing light.
NOTE:
If
advance units are functioning, timing
mark
(D) should
move
down
on
flywheel,
below
5·
mark
when
engine speed is increased.
DISTRIBUTOR AND NO. 1 SPARK PLUG
TIME TO
5·
BEFORE TOP CENTER AT 500 RPM
54
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